Ebnest t



Feb. 20, 1923 E. T. DRAKE.

VACUUM ASPIRATOR.

FILED OCT. I5. 1921- l/Vl/E/VTOR Drake WITNESSES A TZ'ORNEVS Patented Feb. 23, 1923. v I i nrarest eoiFri,

, ERNEST IT. DRAK or ros'ronm, OHIO.

VACUUM ASPIRA-TOR.

Application filed October 15; 1921. Serial No. 508,Q3 3.

T'0 aZZ wh 077 z it ma-yconcern: Y the delivery conduit 12 and consists of Beit that T, Ennnsr T. DRAKE, a complementary plates designated at 13 and citizen o t-the United States, and a resident 14 (see Figure 8) which slidably overlap and 55 of ih g stcgria,v inathe-countyot Seneca {and which hai 'e their adjacent ends provided 5 State of Dhio have invented, certain new with Vshaped notches l3 and 14 respecuseful Improvements in Vacuum Aspitiyely. It is obvious that the plates may be IatOlS, fWh'lQ fi f l wing is a specificaslidably adjusted to entirely overlap each tion. n p v other and close the passage from the de- 60 My .innention. relates to an improved livery conduit to the cylinder or that they yacuurn .aspirator .forgrain. i may be adjusted so that their notched ends :Theobjject of the invention is to proalone overlap to thedesired degree. .YVhen yide an improved yacuum aspirator of this the notched ends only over1ap,the V-shaped v character which is especially: adapted for notches thereof define the inlet opening into 65 use in {the handlingand manufacturing and the cylinder as more clearly indicated in 15 r a pirating and purifying grain, such as Figure i I I f i -wheat, cornfrye, oatsyqbarley and grain by- It is to be understood that any type of p ro'ductsaand is. of simple and durafeed controlling; means known to those ble construction, reliable inoperation and skilled in the art vIna-y be ,utiliz edfor con- 70 easy and inexpensivetognanufacture. v trolling communication betweenlthe deliyery ,Qther objeets and advantages reside in conduit 12 and the outer cylinder 10 and certain nw l teatur s of the construction, that the details of the construction of the arrangement and. combination of parts feed controlling means hereinabove do- ,which' will be hereinafter more fully de scribed vforms no essential part of the inscribed and particularly pointed out in the vent-ion claimed in this application.

.a ended claims reference bein had to An innerc linder 15 is axiall arran 'ed PPM H. ...7 w Ti Y the accompanying drawings, forming a part within the outer cylinder or casing 10 and of this specification, in which, is closed at its top by an imperforate coni- Figure 1 is a ViQW partly in side elei acal head 16 which may be integrally formed 80 tionand ,partly in transverse, ertical sec- I with the cylinder 15. The lower end or" the tion of the first embodiment of 'the invencylinder .is open asshown in Figure 1. The

tion, r v arrangement is such that the apex of the H Figure 2 is a transverse, vertical, sectional conical head is disposed iininediate to and yiew on the ,line of Figure l, and axially .alined with the inlet opening de- 85 Figure V3 is a similar View on, the line fined by the-notches of the plates irrespecof Figure l tiveof the .adjLIStI Q /I thereof- "Re ferring to the drawings wherein, for A'suction pipe ldritends through a suita- .the .sake of illustration, is shown the preble opening therefor in the casing 10 and .iterred embodiment of the invention, the communicates its inner end with the 90 numeral 10 designates an outer cylinder or inner cylinder 15 The suction pipe 18 40 casing constructed of iron: or other suitable leads to any suitable means for creating natejrial" Theaupper endof the cylinder is a suction such, for instance, as any concoiistructed as at 11 and is connected to a ventional suction fan, exhaust pump or the deliyery conduit 12 for the grain or the like. r

" l The innercylinder and the enter cylinlike. v. ;f 'llhe .lowerend of the cylinder 10 is conder define an annular passage 19 for the nect .to the out l et condioiit12" for the grain and at thelGjWer end of this annular j Etlild ll'l imannenthecylinder 10 is passage a circular deflector 2Q of in rted 1 closedlas.to'ingressof airVe eept-in respect frusto-conical form is arrangedand 1s su ta 100 otthelo eningsZS to be hereinafter fully bly Supported upon' the inner mu of the d fined. a l

' 1 outer cylinder lOf A con hined fdeliec'tor ans is provided forcontrolling the adyaly e 210i? conical forrn axially arranged or into the cylinder 10 from Within the deflector 20 and basfe dthe conical head 16 of the inner cylinder 15.

A coil spring 22 is mounted on the rod 22 and abuts the underside of the apex ot the conical head 15 at its upper end andat its lower end a collar or washer 22 fixed to the rod 22. Guiding means is provided for the rod and deflector and consists of a spider comprising a plurality of spider arms 22 consisting of flat pieces of metal secured to the rod at their centers and slidably abutting the inner surface of the inner cylinder 15 at their ends, the arms 22 being twisted adjacent their center or hub so as to present their edges to the substance in the cylinderfor the greater part of their length. I

The outer casing or cylinder 10 is pro vided with a circumferential series of air inlet openings or vents 23, the centers of which lie in a plane well up behind the inverted frusto-conical deflectors 20. An annular valve 24 is mounted on the cylinder and is provided with a corresponding series of openings or vents 25. It is obvious that by rotatably adjusting the annular valve 24-. the series of openings 25 thereof may be brought into and out of register with the series of openings 23 of the casing to thereby regulate the inlet of air through these openings.

In operation, the grain is admitted in suitable quantities into the cylinder 10 by adjustment of the complementary )lates 13 and 14. As it enters through the in at opening defined by the notches of these complementary plates it encounters the conical head of the inner cylinder and by means of this head and the contracted upper end 11 of the cylinder 10 it is uniformly distributed so that in the annular space 19 it is formed into an annular column. As this column descends it strikes the inverted frusto-conical deflector 20 and is deflected inwardly thereby. At this time the suction operating throughthe pipe 18 is effective to induce an upflow of air through the lower end of the outer cylinder-and around the conical deflector 21 into and up through the inner cylinder 15 to the suction pipe 18. It is important to note, however, that the air is admitted only through the openings 23, the

. valve 24 being adjusted for this purpose and that it enters horizontally and is constrained by the deflector 20 to flow downwardly around this deflector and then upwardly between this deflector 20 and the conicaldeflector 21. As it flows around the lower end of the deflector 20 it encounters the grain and from then on its upflow is through the grain. All of the grain which passes through must travel between the deflectors 20 and 21. and thus all f the rain is treated with the result that an 0? the grain is thoroughly aspirated and purified.

1. In a device of the character described, an outer cylinder, a delivery conduit connected to the upper end, means for control.- ling communication between the, delive conduit and the outer cylinder, an inner cy inder axially arranged within the outer cylinder and having a conical head, a suction pipe extending through the outer cylinder and communicating atitsinner end with the interior of the inner cylinder, an inverted frusto-conical deflector carried by the inner wall of the outer cylinder adjacent the lower end f the inner cylinder, a conicaljdeflector spaced from and arranged within the frusto-conical deflector and having its base coincident with the lower end of the frustoconical deflector and its apex disposed within the inner cylinder, said outer cylinder having a circular series of air inlet opening-s around said frusto-conical deflector and a 'valve carried b the outer cylinder for controlling said air inlet openings.

2. In a device of the character described, an outer cylinder, an inner cylinder arranged within said outer cylinder, a suction pipe leading from said outer cylinder and communicating at its inner end with the inner cylinder, an inverted frusto-conical deflector carried by the outer cylinder, said outer cylinder having air openings around said frusto-conical deflector and a cooperating conical deflector carried by said frustoconical deflector.

3. In a device of the character described, an outer cylinder, an inner cylinder arranged within the outer cylinder and having its upper end closed and its lower end open and defining with the outer cylinder a passage therethrough, means for controlling the inlet to said passage, means for creating a suction in said inner cylinder, a variable air inlet arranged-at the lower end of said outer cylinder and deflectors arranged adjacent said air inlet and the lower end of said inner cylinder.

1. In .a device of the character described,

an outer cylinder, an inner cylinder ar-- 5. In a device of the character described,

an outer cylinder, an inner cylinder arranged within said outer cylinder; an inverted frusto-conical deflector carried by said outer cylinder, a combined deflector and valve cooperating with said frustoconical deflector, and adjusting means for said deflector and valve including an adjusting rod, a Wing nut supported on said inner cylinder and threadedly connected with said adjusting rod, a coil spring mounted on said 10 rod, and guiding means for said rod including a spider having its arms slidably abutting the inner cylinder.

ERNEST T. vDRAKE. 

